Disk Manager is a partitioning program based on "parted" similar to "qtparted".
you must have the following in your /etc/portage/package.keywords :
as well as a defined PORTDIR_OVERLAY in your /etc/make.conf :
now go to your portage overlay directory, e.g.
mkdir -p /usr/local/portage
tar xfvz /downloads/70858-diskman-0.9.7_ebuild.tar.gz
emerge -av diskman
arts jfs ntfs reiserfs xfs
run it with
This is my first self created ebuild ever, so you might want to modify it to your needs. For me it worked fine with kde-3.5.8 on x86.